concurrent.js 1.8 KB

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  1. var __defProp = Object.defineProperty;
  2. var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
  3. var __getOwnPropNames = Object.getOwnPropertyNames;
  4. var __hasOwnProp = Object.prototype.hasOwnProperty;
  5. var __export = (target, all) => {
  6. for (var name in all)
  7. __defProp(target, name, { get: all[name], enumerable: true });
  8. };
  9. var __copyProps = (to, from, except, desc) => {
  10. if (from && typeof from === "object" || typeof from === "function") {
  11. for (let key of __getOwnPropNames(from))
  12. if (!__hasOwnProp.call(to, key) && key !== except)
  13. __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  14. }
  15. return to;
  16. };
  17. var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
  18. var concurrent_exports = {};
  19. __export(concurrent_exports, {
  20. createPool: () => createPool
  21. });
  22. module.exports = __toCommonJS(concurrent_exports);
  23. const DEFAULT_CONCURRENCY = 1024;
  24. const createPool = ({
  25. concurrency,
  26. interval
  27. } = {}) => {
  28. concurrency ||= DEFAULT_CONCURRENCY;
  29. if (concurrency === Infinity) {
  30. return {
  31. run: async (fn) => fn()
  32. };
  33. }
  34. const pool = /* @__PURE__ */ new Set();
  35. const run = async (fn, promise, resolve) => {
  36. if (pool.size >= concurrency) {
  37. promise ||= new Promise((r) => resolve = r);
  38. setTimeout(() => run(fn, promise, resolve));
  39. return promise;
  40. }
  41. const marker = {};
  42. pool.add(marker);
  43. const result = await fn();
  44. if (interval) {
  45. setTimeout(() => pool.delete(marker), interval);
  46. } else {
  47. pool.delete(marker);
  48. }
  49. if (resolve) {
  50. resolve(result);
  51. return promise;
  52. } else {
  53. return result;
  54. }
  55. };
  56. return { run };
  57. };
  58. // Annotate the CommonJS export names for ESM import in node:
  59. 0 && (module.exports = {
  60. createPool
  61. });